The heater core on the Ford F-150 supervisor Duty is a radiator-like an equipment that heats up the cabin. If it fails, here"s a step-by-step guide that will present you how to change it.

You are watching: How to replace heater core 1997 ford f150

This article uses to the Ford F-150 (2004-2014).

The heater core is responsible for getting heat into the cabin by pulling warm from the heat coolant leave the motor. When it fails there may be different symptoms depending on how the failed consisting of a loss of heat, home windows fogging inside the cab, a sweet odor inside the cab, or coolant pooling in the passenger side floor board. If the main point fails, possibilities are there is a coolant leak somewhere, therefore it"s crucial to be mindful of the coolant levels until the difficulty is fixed. This isn"t a basic task because that the inexperienced, so if you"re weary of the task, the is encourage to consult a mechanic first.


Materials NeededSocket setPhillips head screwdriversFlat head screwdriversLarge drainpipe pan

Step 1 - drainpipe coolant

To eliminate the heater core, disconnect the coolant lines native it. In stimulate to avoid as much mess together possible, drainpipe the coolant first.

Position a drainpipe pan underneath the drainpipe hole ~ above the radiator.Remove the coolant reservoir cap; make certain the engine is cool prior to removing it.Using a 3/4 socket, remove the drain plug native the radiator to permit it to drain.Once it"s drained completely, re-install the plug. Take caution no to over-tighten it.

Coolant passes with the heater core in vacuum lines, which should be drained that coolant as well. There space two alternatives to eliminate this coolant. The an initial way is come disconnect the lines at the bottom that the degas bottle and use an waiting compressor or something similar to punch the coolant through. The other choice is come disconnect whereby it passes v the firewall, since this requirements to be done anyways, and also blow the coolant through. The first option has you removing/installing more hoses, but allows for much easier angling the the fluid as the comes out to avoid messes.

Figure 1. Eliminate the reservoir"s cap.
Figure 2. Drainpipe the coolant right into a pan.

Step 2 - eliminate old heater core

Disconnect the heater hoses utilizing the fast disconnects located versus the firewall. They are typically somewhere on the passenger side near the top of the engine just on the firewall. To disconnect, push the water tap in, push in the tabs, and then traction the hose off. This can be a small tricky so it may take a few tries.

Figure 3. Remove heater main point hoses.
Figure 4. F-150 rapid disconnects.

Step 3 - remove glove box

Remove the glove box door to access the mix door and heater core from inside the automobile cabin. Eliminate the glove box by simply squeezing both sides to the inside; it must come off.

Figure 5. Remove by squeezing both political parties of the door.

Step 4 - Disconnect vacuum line connector and also panel pod

Disconnect the vacuum line connector and the vacuum line panel pod through prying them off gently. It"ll be one of the few things you view running through there for this reason it"s difficult to miss. Then, disconnect the electric connector native the blend door actuator; it"s located in the upper left corner.

Using her socket, unbolt the mix door actuator, and also then very closely remove it.Using her socket, eliminate the floor panel vacuum pod.
Figure 6. Mix door actuator (orange arrows), blend door actuator electric connection, vacuum pod (left the actuator).

Step 5 - eliminate heater core

To remove the panel, background it increase from underneath and also then slide it out with the glove box opening. You need to be cautious not to damage the sealing foam top top it.

Position the blend door out of the method so that won"t obstruct the remove of the heater core.Carefully remove the old heater main point by pulling it through the opened in the glove box.
Figure 7. Heater main point exposed.

Step 6 - Install brand-new heater core

Install is the turning back of removal, but you still must take special treatment to do sure every little thing lines up properly and also is installed correctly.

When installing the heater core, make certain the hoses line up and slide v the holes in the firewall properly. If you shot to pressure it friend can damages the lines and also cause it to leak. Make certain the sealing foam is intact about the heater core when it"s in place.Install the heater core accessibility panel cover.Install the blend door actuator bracket and make certain it"s effectively securing the hoses come the firewall.Install the blend door actuator and reconnect the cable harness to it.Install the floor dashboard vacuum pod.Reconnect the vacuum lines and also secure them right into the organize downs.Re-install the gloves box door.

At this point, you"re finished through the install. All that is left now is to refill the coolant, make sure there is no wait in the lines, and then execute a test. In addition to do sure every little thing works once testing, make certain there space no coolant leaks.

See more: What Role Does Oxygen Play In Cellular Respiration ? Cellular Respiration

Pro Tip

It"s recommended to get new quick disconnects because that the hoses in the engine bay since they"re cheap and it"ll aid ensure a leak-free fit. As soon as installing them, make certain there is a teflon washer between the 2 o-rings. As soon as you push them ~ above the hoses, make certain you hear a click and also give that a tug to make certain they"re top top tightly.